University of Missouri Extension

IPM1007, Revised November 2009

Practical Weed Science for the Field Scout: Corn and Soybean

Deadnettle, purple (Lamium purpureum)

Winter annual broadleaf

A winter annual weed with square stems and pink to purple flowers. Seedlings have cotyledons that are oval with a notch at the base of the cotyledon where it joins the petiole. Leaves are opposite, heart shaped to triangular in outline, sparsely hairy or without hairs. Leaf margins have a “scalloped” appearance and are toothed and often bristly hairy. Stems root at the lower nodes and are square in cross section. Flowers are pink to purple in color and are fused into a tube about 2/3 inch long. Unlike henbit, purple deadnettle has upper leaves that are triangular and occur on petioles.

IPM1007 Practical Weed Science for the Field Scout: Corn and Soybean | University of Missouri Extension